High and very high modes from energy, particle, and momentum transport models

Time‐dependent simulations of energy, particle, and momentum transport are presented, which show improved confinement similar to the high mode (H mode). The transport model incorporates the suppression of turbulence by sheared flows, which are self‐consistently calculated. Constraints on the turbule...

Full description

Saved in:
Bibliographic Details
Published in:Physics of plasmas 1994-04, Vol.1 (4), p.909-926
Main Authors: Staebler, G. M., Hinton, F. L., Wiley, J. C., Dominguez, R. R., Greenfield, C. M., Gohil, P., Kurki‐Suonio, T. K., Osborne, T. H.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CLOSED PLASMA DEVICES
CONFINEMENT
ENERGY TRANSFER
FLUID FLOW
LINEAR MOMENTUM TRANSFER
MASS TRANSFER
MOMENTUM TRANSFER
PLASMA CONFINEMENT
THERMONUCLEAR DEVICES 700330 > Plasma Kinetics, Transport, & Impurities-- (1992-)
TOKAMAK DEVICES
TRANSPORT THEORY
TURBULENT FLOW
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Time‐dependent simulations of energy, particle, and momentum transport are presented, which show improved confinement similar to the high mode (H mode). The transport model incorporates the suppression of turbulence by sheared flows, which are self‐consistently calculated. Constraints on the turbulence model from the time evolution of the temperature, density, and velocity profiles are discussed. A regime similar to the very high confinement mode (VH mode) is found to result at higher heating power due to an increase in the width of the transport barrier. Coneutral beam injection lowers the power required for VH mode substantially due to the toroidal rotation shear. The possible role of edge momentum sources such as ion orbit loss is considered, and a comparison between biased probe‐induced and heating‐induced H modes is made.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.870750